bodge



(No Model.) 2 Sheets-Sheet 1.

M. B. DODGE.Y

ORE GONGENTRATOR. No. 406,201. v Patente-d July 2, 1889.

i, f uw (No Model.) 2 Sheets-Sheet 2.

M. B. DODGE.

ORE CONGENTRATOR.

Patented July 2, 1889 UNITED STATES PATENT OFFICE.

MILES B. DODGE, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO PARKE &

LACY, OF SAME PLACE.

ORE-CONCENTRA-roa.

SPECIFICATION forming part of Letters Patent No. 406,201, dated July 2,1889.

Application filed July 6, 1888. Serial No. 279,208. (No model.)

-1o minerals or other substances.

It consists in certain details of construction, all of which will bemore fully explained by reference to the accompanying' drawings, inwhich- Figure l is a perspective view of my apparatus. Fig. 2 is anenlarged perspective view of the upper part of the feed-hopper and theoverliow-troughs. Fig. 3 is a longitudinal vertical section of themachine.

zo A is the inclined shaking-table, having the surface B covered withrubber, and upon this table the material is deposited by means of holesC in the boxD, which extends transversely above the table, as shown. Thematerial is delivered into the box D from the segmental receiver E,being distributed by the rotary arms F, as shown.

G is a hopper, having a plug H, as shown, fitted into its lower end,with a small perfo- 3o ration of suflicient size to allow the thin pulpto pass through as rapidly as may be desired,

this pulp being discharged into the segmen-V tal receiver E. In order toseparate the coarser material which would not pass through the plug H,the spout I, which brings the material from the battery or other pointof supply, discharges into the box J, having' a screen bottom K, whichpermits only that portion which is sufficiently line to pass through,the 4o other portionbeing removed or otherwise discharged from time totime.

The table A is caused to oscillate or vibrate endwise by means of a camL and spring M, the cam forcing the table in the directionu of itslength and toward the lowest point of its inclination with a gentlemovement, while the spring M brings it back in the direction of itshighest end with a sudden sharp motion, the movement being abruptlychecked 5o by the upp'er end of the table striking against theadjustable bulfers N, this operation bein g similar to that shown inother machines of this class.

Vater is supplied through holes in the pipe O, and, being dischargedupon the upper end of the table, flows downward, carrying the lightermaterial to the lower end of the table,

while the heavy mineral is gradually brought toward the upper end by theconstant jarring caused by the abrupt stoppage of the table, 6o as abovedescribed.

In feeding the pulp upon this class of tables considerable difficulty isencountered by reason of too great a supply of water with the pulp whichis delivered upon the table, and this seriously interferes with theproper action of the current discharged upon the upper end of the tablefrom the pipe O.

In order to regulate the discharge of water and material upon the table,I have devised 7o the hopper G, above described, and the plug H at thelower end, having the small opening, enables me to provide a constantfeed for the table,which is just sufficient, so that the current fromthe pipe O will do its work eiiiciently 7 5 in carrying off anddischarging the gangue or lighter material, while the sulphurets andheavier material gradually move up the surface B. The trough D,extending across and near the surface of B, having the holes C 8o aboutan inch apart, will deliver the pulp upon the table properlydistributed, and at the same time this arrangement of the holes leavesample space between them for the flow of Water and lighter material,which it is desirable to have pass down the table.

In order to dispose of any surplus water and light material which isdischarged into the hopper G, it is allowed to flow over the edges at P,Figs. 2 and 3,@these edges being 9o somewhat lower than the top of thehopper, so as to allow the overliow to discharge into troughs Q uponeach side of the hopper, and this discharge flows into the pipe R, bywhich it is led directly into the segmental receiver 95 S, which isconstructed similarly to the one shown at E, this receiver having alsothe rotary arms or distributers T, similar to those at F. This lightermaterial is discharged over the bar U,which extends across the lower 10oedge of the receiver S, and the material thus discharged falls upon thelower portion V of the inclined table A. rlhere is always a smallportion of the heavier material which is pulverized so line that it willnot be carried up ward against the moving current by the motions of theoscillating table, and this material will some of it pass downwardthrough the pipe R and be received upon the table at V, and some of it,passing from the table B over the transverse riiicle \V,will` also fallupon the table V below the riiiie, and the whole of it is stirred up andagitated by the pins X, which project downward from the bar U, so as todip into this material, the movements of the table causing these pins toact as stirrers in the same manner as if the pins themselves weremovable. The heavy'fine material which comes upon this table is thuscaused to settle to the bottom, while the lighter gangue iiows olf overthe lower end, the riiiies or steps Yarranged at this end preventing themore valuable portion from liowing ed with it. This valuable materialwhich falls upon the table V is shoveled out from time to time andsaved.

The upper end of the table B has a concave depression a, into which thesulphurets and other valuable heavy material are gradually carried bythe concussion of the table, and this mineral is discharged through theopening or passage l) inte a trough or receiver c. A considerablequantity of line or oured mercury will always accompany the mineral, andif the discharge-opening b were level with the surface of the table allthis mercury would be carried out with the mineral. In order to separateit from this mineral and save it, an elevated portion d is formed in theconcave upper end a. of the table. This elevation d has the opening l)made through it. As the valuableheavy mineral accumulates so as to beabove the top of this elevation, it is manifest that it will dischargecontinuously from the opening h into the receiver c; but as the mercuryis considerably heavier than any other portion it will settle down intothe depression or eoncavity a, and will not go od' through the openingl).

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. The hopper G, provided with the box J, the screen K, and the troughsQ upon each side of the hopper, said troughs having the overow-edges P,in combination with the perforated plug ll', for regulating thedischarge from the hopper, substantially as herein described.

2. The hopper or receiver G, provided with the screen K, theoverflow-passages, and a regulating dischargeplug l-I, in combinationwith the segmental receiver E, the rotary distributing-arms F, and thebox D, placed between the receiver E and the table B, and havingperforations C made through it, so as to leave space for the downwardflow of material on the surface of the table l between the points Wherethe pulp is supplied to the table, substantially as herein described.

3. The hopper G, provided with the screen K, the overflow pipes orpassages, and the discharge-pipe R, in combination with the supplementalreceiver S, distributer T, discharging upon the surface V of the tablebelow the riflie W, and. the stirrers or agitators X, substantially asherein described.

In witness whereof l have hereunto set my hand.

MILES B. DODGE.

lVitnesses: t

JOHN E. IIAMILL, Janus 'F.iNsnnv.

